Combined counting board and abacus



FIG. 1 is a top view of the combined counting board and abacus showing my new design, the bottom view being substantially identical thereto;

FIG. 2 is a side view of the combined counting board and abacus shown in FIG. 1, the opposite side being substantially identical thereto; and,

FIG. 3 is an end view of the combined counting board and abacus shown in FIG. 1, the opposite end being substantially identical thereto. 

The ornamental design for a combined counting board and abacus, as shown. 